<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ul,li{
            margin: 0;
            padding: 0;
            list-style: none;
        }

        ul.timeline li{
            border-left: 2px solid #e4e7ed;
            padding-left: 24px;
            position: relative;
            padding-bottom: 20px;
        }

        ul.timeline li .title{
            line-height: 1;
        }

        ul.timeline li:last-child{
            border-left-color: transparent;
        }

        ul.timeline li::before{
            content: "";
            display: block;
            width: 12px;
            height: 12px;
            background-color: #e4e7ed;
            border-radius: 50%;
            position: absolute;
            left: -7px;
            top: 0px;
        }
        ul.timeline li .desc{
            font-size: 14px;
            color: #909399;
            line-height: 1.2;
            margin-top: 8px;

        }
    </style>
</head>
<body>
    <ul class="timeline">
        <li class="timeline-itme">
            <div class="title">2013年</div>
            <div class="desc">Vue首次发布</div>
        </li>
        <li class="timeline-itme">
            <div class="title">2014年</div>
            <div class="desc">Vue第二次发布</div>
        </li>
        <li class="timeline-itme">
            <div class="title">2015年</div>
            <div class="desc">Vue第三次发布</div>
        </li>
        <li class="timeline-itme">
            <div class="title">2016年</div>
            <div class="desc">Vue第四次发布</div>
        </li>
        <li class="timeline-itme">
            <div class="title">2017年</div>
            <div class="desc">Vue第五次发布</div>
        </li>

    </ul>
</body>
</html>